Need to declare a member variable transient for AssociationMaps

The storage specification for susybsm::TracksEcalRecHitsMap was missing a required
transient declartion for the member variable transientMap_. Without that declaration,
it is impossible for ROOT to create a StreamerInfo for the class and therefore impossible
to read/write instances of the class.
Merge pull request #1989 from Dr15Jones/fixMissingDictInAnalysisDataFormatsSUSYBSMObject

AT fixes -- Need to declare a member variable transient for AssociationMaps